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"The objective of this research by the Bureau of Mines was to determine the technical feasibility and associated pilot data for drying minus 1/4-in coal with microwave energy at a frequency of 2.45 Ghz. The drying data were obtained experimentally on three coal types: bituminous, subbituminous, and lignite. The experiments were performed with a custom-designed conveyorized microwave oven having a continuous power capability of 12 kw. Drying efficiencies near the theoretical maximum of 1.54 Kg of water per kilowatt hour of energy input were achieved for two coals and two sizes; overall drying efficiences averaged 77 pct." - NIOSHTIC-2

"The Bureau of Mines conducted a laboratory study of the measurement of the water and rock dust (rd) contents of synthetic mine-type coal dust (cd) mixtures using a commercial unit for measuring water content and several prototype radiometric units f...

"Full-column anchored resin bolts were first used in underground mines in 1972. These bolts appear to improve support in many roof bolt applications, as indicated by the use of about 30 million resin bolts in 1980. In the mid-1970's, Bureau of Mines ...

Revised edition. : "Occupational diseases are discussed in terms of occupational health hazards. The purpose of the text is to make available information needed for timely recognition of symptoms of occupational diseases. The text covers routes of en...

National Institute for Occupational Safety and Health, Division of Respiratory Disease Studies.

Published:

September 1996

Series:

NIOSH technical report
DHHS publication ; no. (NIOSH) 96-136

Description:

"The National Occupational Health Survey of Mining (NOHSM) was conducted at 491 mines during 1984 through 1989. There were 60 coal mines and 431 metal and nonmetal mines. The mines employed 59,734 miners, representing 66 mineral commodities. The surv...

Reusing filtering facepiece respirators (FFRs) has been suggested as a strategy to conserve available supplies for home and healthcare environments during an influenza pandemic. For reuse to be possible, used FFRs must be decontaminated before redonn...